Sound-box mounting.



A. A. HUSEB-Y. SOUND BOX MOUNTING. I APPLICATION FILED .IULY I9, I916-Pmmea Sept. 11, 1917.

- ALBERT A. HUSEBY, or. CHICAGO, ILLINOIS.

SOUND-BOX MOUNTING.

Specification of Letters Patent. Patented Sept. 11,1917.

Application filed July 19, 1916. Serial No. 110,042.

To all whom it may concern:

Be it known that I, ALBERT A. HUsEBY,

acitizen of the United 'States, residing at Chicago, in the county ofCook and State of Illinois, have invented certain new and usefulImprovements in Sound-Box Mountings, of which the following is aspecification.

This invention relates to sound box mountings for talking machines, andhas reference more particularly to that type of mountings which permitsthe sound box to be adjusted in position so as to play records of eitherthe vertically cut or the laterally cut type.

' The object of my invention is to provide means for automatically andyieldably looking the sound box in both of its adjusted positions sothat it will be rigidly retained against displacement and will beprevented fronrrattling or vibrating so as to set up undesirablevibrations which would impair the tone of the machine. 5

Figure 1 is a side elevation of a portion of a tone arm with a sound boxattached thereto, in accordance with my invention;

Fig.2 is a view looking toward the left in Fig. 1, the soundbox beingshown in dotted lines in the position which it assumes when adjusted toplay records having lat- Fig. is a view similar to Fig. l, certainportions being shown in section.

Referring to the drawings, reference character 5 indicates generally asound box of well known general construction comprising the customarydiaphragm 6, 'pivotally mounted vibrating lever 7 .and needle or stylus8 mounted in the lower end of the lover. The rear wall of the box isprovided with a sound-conducting tube 9-in the form of an upturned elbowwhich is provided at its base with a flange 11 secured to the rear' wall12 of the sound box by screws 13 or other suitable fastening means. Toabsorb vibrations between the sound box and the elbow a rubber gasket orwasher 14 is interposed between the flange 11 and the rear wall of thesound bo x ,.and a circular member 15, corresponding in shalpe to theflange 11 aud the gasket 14, is clamped between this flange and thegasket by fastening screws 13 and has an upward extension 16 terminatingin a tapped head 17 in which is threaded a clamping screw .18 for apurposewhich will be later described.

The tone arm 19, a fragment only of the outer end ofwhich is shown onthe drawings, is of elbow shape at its extremity and is reduced in sizeupon its outer periphery,

crown of the elbow on' the tone arm is provided with 'an upwardlyextending boss 22 having a depression in its top forminga seat toreceive the lower end of the clamping screw 18. When the parts areassembled and this screw is tightened up the sound box will be firmlyclamped to the tone arm without any extensions or projections through orinto the sound passage which might interfere with the sound Vibrationsand the tone of the machine. This connection between the tone arm andsound box since the screw 18 is disposed in axial alinement with thecenter of the joint between the tone arm and the sound box permitsrotative movement of the sound box relaeral undulations of the soundgroove; and

tively to the tone arm from the position lines in Fig. 2, thus adaptingthe device to both types-of records.

' For the purpose of limiting the'swinging movements of the sound boxrelatively to the tone arm to an arc-of approximately degrees, the lowerend of the tone arm is provided at one side with a shoulder 23 and theupper edge of the elbow 9 is provided with an elongated recess 24 inwhich the shoulder.23 is adapted to travel, the swinging movement oftheisound box being limited in each direction by abutment of theshoulder 23 against one end or the other of the recess 24. I

For the purpose of automatically locking the sound box in its adjustedpositions the lower 'edge' of the shoulder 23 is provided with .asmallprojection 25 and the recess the projection 25 snugly fits when thesound box is adjusted (to either of its working positions. The member 16which is made of sheet metal or other similar material is screw 18,which suliiciently resilient to peri'nit a slight separation of thejoint between the tone arm and sound box which enables the projection 25to travel upwardly out from the locking depression "'26 when force is appl led to the sound box to swing it about its pivot. it will be obviousthat the tension oi" the 1nein ber 16 may be regulated by adjusting; theis always set sulliciently tight to make a snug joint, and prevent vibration between the sound box and the tone arm. To further lend rigidityto the structure-the rear wall or the sound box is provided near the topwith a rearwardly pro jecting stud 27 which snuglj' fits into a groove28 formed in the face oi? the extension 10., this extension being, forpurposes oi economy, n'eierably stamped so as to form a groove therein,as shown.

It will be manifest from the foregoing that l have provided a sound boxmounting which is strong, durable and rigid, is relatively cheap tomanufacture and serves to hold the sound box firmly united to the soundtube without any extension through or into the sound passage,and whichalso permits the sound box to be adjusted from a position. parallel withthe tone arm to a position at right angles thereto, so that theinstrument can be used in connection with both. types of records bysimply adjusting the position of the sound box. The details ofconstruction illustrated and described are .arin. and box, and

. jection and a obviously capable of considerable modification andvariation without departing from the essence of the invention as definedin the following claims:

I claim 1. In a sound reproducing machine, the combination of a tonearm, a sound box constructed to rotatably engage the outer end of arm,means outside" the sound passage for holding said sound box in opereative relation to said tone arm but permitting relal ive rotati vemovement between said cooperating means on said arm and sound box foryicldably locking said sound box at the end of its adjusting movement ineach direction.

in a sound reproducing machine, the combination of a tone arm having areduced outer end provided with a shoulder, a sound box having an elbowtelescopically and r0- tatably engaged with said end of the tone arm,said elbow having an arcuate recess to receive said shoulder, means forpreventing disengagement of said sound box from said tone arm, and meanseonnvrising a procorrespondingly shaped depression formed on the opposedfaces at the junction of said. tone arm and the sound box whereby saidsound box locked in adjusted position with relation to the tone arm.

ALBERT A. HUSEBY.

